<template>
    <el-container class="home-container">
        <!--头部区域-->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商管理后台</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!--页面主体区域-->
        <el-container>
            <!--侧边栏-->
            <el-aside :width="isCollapse ? '64px' : '200px'">
                <div class="toggle-button"
                @click="toggleCollapse">
                    |||
                </div>
                <!--侧边栏菜单区-->
                <el-menu
                background-color="#333744"
                text-color="#fff"
                active-text-color="#409EFF"
                unique-opened
                :collapse="isCollapse"
                :collapse-transition="false"
                router
                :default-active="activePath">
                    <!--一级菜单-->
                    <el-submenu :index = "item.id + ''" v-for="item in menulist" :key="item.id">
                        <!--一级菜单模板区域-->
                        <template slot="title">
                            <!--图标-->
                            <i :class="iconsObj[item.id]" class="tubiao"></i>
                            <!--文本-->
                            <span>{{item.authName}}</span>
                        </template>

                        <!--二级菜单-->
                        <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                            <template slot="title">
                                <!--图标-->
                                <i class="el-icon-menu"></i>
                                <!--文本-->
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!--右侧内容主体-->
            <el-main>
                <!--路由占位符-->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
    data() {
        return {
            menulist: [],
            iconsObj: {
                '125': 'el-icon-user-solid',
                '103': 'el-icon-star-on',
                '101': 'el-icon-s-goods',
                '102': 'el-icon-s-order',
                '145': 'el-icon-s-data',
            },
            //是否折叠
            isCollapse: false,
            //被激活的地址
            activePath: '',
        }
    },
    created() {
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
        logout() {
            window.sessionStorage.clear();
            this.$router.push("/login");
        },
        //获取所有的菜单
        async getMenuList() {
            const {data: res} = await this.$http.get('menus')
            if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
            this.menulist = res.data
            console.log(res)
        },
        //菜单展开与折叠
        toggleCollapse() {
            this.isCollapse=!this.isCollapse
        },
        //保存index值
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath = activePath
        }
    }
}
</script>

<style lang="less" scoped>
.home-container {
    height: 100%;
}
.el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div {
        display: flex;
        align-items: center;
        > span {
            margin-left: 15px;
        }
    }
}
.el-aside {
    background-color: #333744;
    .el-menu {
        border-right: none;
    }
}
.el-main {
    background-color: #EAEDF1;
}
.tubiao {
    margin-right: 10px;
}
.toggle-button {
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>